The issue of the semantic, pragmatic and axi-ological specifics of cybersecurity discursive practices as it is displayed in the genres of me-dia and online communication is considered. The novelty of the work lies in the applica-tion of the corpus linguistics methodology to the study of discourse, understood as a lan-guage-mediated social practice. The relevance of the work is due to the interest of linguis-tics in the study of discursive practices that shape a new social reality formed as a result of the Russian language functioning. By using the methods of corpus linguistics, the cogni-tive-semantic structure of discursive thesau-rus, which comprise a new layer of lexical units, has been reconstructed, thematic groups of lexical units have been identified and their distribution in various genres of cybersecurity discourse has been established. It has been found that along with the terminology focused on the transfer of operational, practical knowl-edge about safe online practices, the texts in the corpus regularly employ lexical units with military and aggressive semantics, which in-dicates the contradiction between the goals of the discourse aimed at forming a positive attitude towards digital technologies, and lan-guage means employed to achieve them. It is shown that due to regular occurrence of neu-tral lexical units in negatively colored con-texts, they develop negative evaluative con-notations, which also contributes to the for-mation of users' distrust of new technologies, enhances the feeling of risk, and generates anxiety and concern.